A few that have cranked up their torsion bars to lift the front of the truck complained about the resulting 'pogo-stick' ride. That happens when the A-arms no longer rest on the yellow travel stops/bumpers and the suspension can move more freely. When that happened to me, I just reached under the truck and cranked the red knob on the Rancho shocks a couple clicks stiffer. Problem solved.
Can't do that with Bilstiens...
for what it's worth...